| 单词 | weaken a system |
| 释义 | weaken a system The mycorrhizal support system weakens. Retrieved from Wikipedia CC BY-SA 3.0 Their immune systems weaken as they age, which means that any techniques that could improve them are critically important. Times, Sunday Times Reforming a system weakened by generations of local authority control and union dogma will take time. Times, Sunday Times However, the virus often lies dormant in the body and as the immune system weakens later in life it can re-emerge as shingles. Times, Sunday Times Shortly thereafter, the system weakened and the circulation became exposed from the deep convection. Retrieved from Wikipedia CC BY-SA 3.0 |
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